Fireproof window-curtain.



PATENTED NOV.'14, 1905.

M. BERWANGER. FIREPROOP WINDOW CURTAIN.

AYPLIOATION FILED DEC.8,1904.

I NVE/V TOR w gs WITNESSES:

@Ytomey MICHAEL BERWANGER, OF PHILADELPHIA, PENNSYLVANIA.

FIREPROOF WINDOW-CURTAIN.

Specification of Letters Patent.

Patented NOV. 14, 1905.

Application filed December 8, 1904. Serial No. 236,057,

To all whom it may concern:

Be it known that I, MICHAEL BERWANGER, residingat Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Fireproof Window-Curtains; and Ido hereby declarethat the following is a full, clear, and exact description of my invention, reference being had to the accompanyingdrawings, which form part of this specification.

This invention relates to fireproof windowshades for the purpose of excluding heat from rooms protected thereby in case of fire in neighboring buildings, and is of the class of such window-shades intended to be released by heat from fire in such neighboring buildings.

.The invention consists of the matters hereinafter set forth, and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is front elevation of a window protected by my shade, the shade being in the position which it will assume when released by heat of the roller, the releasing mechanism being concealed. Fig.2 is a front elevation of same, the outside casing of the window-frame being removed and revealing the roller f, the shade u rolled thereon, the supporting mechanism of the roller, and counterbalancing-weights p of the releasing mechanism.

Fig. 3 is a longitudinal vertical section along the axis of the roller, showing in section axle A, bearing B, supporting-bracket I), releasing-arms a a, fusible connection between the releasing arms 0, depressing spring d, the bearing of the same 6, the roller f, fixed clutch-wheel g, secured to the roller by setscrews it, loose clutch-wheel '5, affording barrel j, upon which the counterbalancing-cord Z6 is wound. Loose clutch-wheel i has sprockets Z, which engage chain 1 The releasing-arms a a rest loosely in supporting-staples w m, which are driven into the wall. Loose clutchwheel 71 has a bearing upon bearing-wheel n, which moves freely upon shaft B. Bearingwheel n is attached to extensions of the arms a by set-screws 0. The curtain u, of thin corrugated sheet metal, is secured to roller f by screws 25, and s is a coil-spring which under compression bears against loose clutch-wheel 2'.

Fig. 4 is the inside View of a window protected by my fireproof shade and shows chain g, which moves over pulley Normally the shades are rolled upon the roller, weights p by means of cord l1: holding them in position so long as bars a are held in position by the fusible fastening 0, because they, the bars a, retain loose clutch-wheel i in engagement with fixed clutch-wheel g. When the fusible fastening 0 is melted, the spring .9 in extending forces loose clutch-wheel out of engagement with fixed clutch-wheel then the weight of the curtain it causes it to unroll and fall before the window, affording protection against fire. When desired, the curtain can be drawn down from the inside of the house by means of chain g, which can be secured by engaging one of the links with projecting pin to, which is provided for the purpose, as shown in Fig. 4.

Fig. 5 is an enlarged detail section of the end of the roller.

Many changes may be made in the structural details without departing from the spirit of my invention, and I do not wish to be limited to such details except as hereinafter made subject to specific claims.

I claim as my invention, and desire to secure by Letters Patent, the following:

1. The combination of a curtain of corrugated metal with a roller containingalongitudinally-compressed coil-spring adapted to free the curtain so that it may drop when the compression is relaxed, substantially as described.

2. The combination of a curtain of corrugated metal with a roller containingalongitudinally-compressed coil-spring, with clutches adapted to secure the curtain in a rolled-up position until the pressure upon the spring is relaxed, and then to become disengaged by its pressureso as to permit the curtain to drop, substantially as described.

3. The combination of a curtain of corrugated metal with a roller containingalongitu: dinally-compressed coil-spring, with clutches adapted to secure the curtain in a rolled-up position until the pressure upon the spring is relaxed, together with bars adapted to hold the clutches engaged, and a fusible fastening for securing the bars restraining position until the said fastening is melted, substantially as described.

4. The combination With a fireproof Win- In testimony whereofIafiix mysignature in dow-shade secured to a roller of a fixed presence of two Witnesses. clutch-Wheel secured to said roller, adapted to be engaged with a loose clutch-Wheel, with MICHAEL BERWANGER' 5 releasing-arms adapted to be released by the Witnesses:

melting of a fusible fastening, substantially J. BAYUK,

as described. GEO. W. BRYANT. 

